Go 템플릿에서 for 루프를 어떻게 효과적으로 사용할 수 있나요?

<code class="go">type Person struct {
    Name string
    Age  int
}

func main() {
    people := []Person{{"John", 30}, {"Mary", 25}}
    tmpl := template.Must(template.New("loop").Parse(`
        {{range .}}
            Name: {{.Name}}
            Age:  {{.Age}}
        {{end}}
    `))
    tmpl.Execute(os.Stdout, people)
}</code>

<code class="go">func For(start, end int) chan int {
    c := make(chan int)
    go func() {
        for i := start; i < end; i++ {
            c <- i
        }
        close(c)
    }()
    return c
}</code>

<code class="go">tmpl := template.Must(template.New("loop").Parse(`
        {{range For 0 10}}
            i: {{.}}
        {{end}}
    `))
tmpl.Execute(os.Stdout, nil)</code>